CN111106702B

CN111106702B - Motor casing and motor

Info

Publication number: CN111106702B
Application number: CN202010095493.7A
Authority: CN
Inventors: 谭财胜; 焦雷; 徐照东; 伍炜杰; 周潮
Original assignee: Guangdong Bozhilin Robot Co Ltd
Current assignee: Guangdong Bozhilin Robot Co Ltd
Priority date: 2020-02-17
Filing date: 2020-02-17
Publication date: 2020-12-18
Anticipated expiration: 2040-02-17
Also published as: CN111106702A

Abstract

The invention relates to a motor shell and a motor, wherein the motor shell comprises a front end cover and a shell body, the shell body extends towards one side from the outer periphery of the front end cover, the front end cover is provided with a bearing chamber and a shaft hole communicated with the bearing chamber, the outer end face of the front end cover is provided with an installation part, the installation part is provided with an installation hole, and the installation hole is used for being matched with a fastener so as to detachably install an oil seal plate on the installation part. The motor casing can be simultaneously suitable for the motor with the oil seal and the motor without the oil seal, and the length of the whole motor without the oil seal can be effectively shortened.

Description

Motor casing and motor

Technical Field

The invention relates to the technical field of motors, in particular to a motor shell and a motor.

Background

With the continuous development of the intelligent equipment industry, people hope to reduce the equipment volume under the condition of meeting the requirements, correspondingly, the volume of the motor used in the equipment also needs to be reduced continuously, the power density of the motor needs to be increased, and the overall length of the motor also needs to be shortened continuously.

Traditional motor divide into usually to take the oil blanket motor and do not take two kinds of types of oil blanket motor, and the front end housing of this two kinds of types of motor sharing usually has seted up the oil blanket room on the front end housing, has promptly to take the oil blanket motor when the oil blanket is indoor to be installed, does not take the oil blanket motor promptly when the oil blanket is indoor to be installed. For the traditional motor without the oil seal, because the oil seal chamber of the front end cover is not provided with the oil seal, the oil seal chamber is not utilized, the length of the whole motor is increased due to the oil seal chamber, the weight of the motor is increased, the power density of the motor is reduced, and the development trend of motor miniaturization is not met.

Disclosure of Invention

In view of the above, it is necessary to provide a motor casing and a motor, wherein the motor casing can be simultaneously applied to a motor with oil seal and a motor without oil seal, and the length of the whole motor without oil seal can be effectively shortened.

The utility model provides a motor casing, includes front end housing and casing body, the casing body certainly the outer peripheral edges of front end housing extend towards one side, be equipped with the bearing room on the front end housing, and with the shaft hole of bearing room intercommunication, the outer terminal surface of front end housing is equipped with the installation department, be equipped with the mounting hole on the installation department, the mounting hole be used for with the fastener cooperation to with oil seal board detachably install in the installation department.

The mounting part is arranged on the front end cover of the motor shell, when the motor shell is used for a motor with an oil seal, the oil seal plate is attached to the mounting part, and then the fastener penetrates through the oil seal plate to be matched with the mounting hole so as to lock and fix the oil seal plate on the mounting part, so that the oil seal plate can be mounted and fixed; when being used for not taking the oil blanket motor, pull down the oil blanket from the installation department, do not install the oil blanket can, because do not take the oil blanket motor not install the oil blanket for do not take the oil blanket motor effectively to shorten at the ascending length of axial, power density improves.

In one embodiment, the mounting portion is further provided with a first seal groove for mounting a first seal, and the first seal is used for sealing and connecting the oil seal plate and the front end cover.

In one embodiment, the mounting portion is recessed inward relative to an outer end face of the front end cover to form a positioning groove having a groove depth smaller than a thickness of the oil seal plate.

In one embodiment, the front end cap is integrally formed with an end of the housing body.

In one embodiment, the inner circumferential wall of the shell body is provided with an axial positioning step, and the axial positioning step is used for limiting and abutting against the end face of the stator assembly.

In one embodiment, the inner end surface of the front end cover is provided with an annular flange at the periphery of the bearing chamber, and an injection molding cavity is formed by the annular flange and the shell body in an enclosing mode.

In one embodiment, a second sealing groove for mounting a second sealing element is formed in the annular flange, and the second sealing element is used for being matched with an injection core rod during injection molding so as to block the injection molding cavity from the bearing chamber.

In one embodiment, the end face and the peripheral surface of the annular flange are provided with the second sealing groove.

In one embodiment, the inner end face of the front end cover is further provided with a positioning concave part communicated with the injection molding cavity.

An electric machine comprising a machine housing as claimed in any preceding claim.

Drawings

Fig. 1 is a schematic structural diagram of a motor casing according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the motor casing shown in FIG. 1;

FIG. 3 is a cross-sectional view of an embodiment of a motor casing injection molded with a first size stator assembly;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a cross-sectional view of an embodiment of a motor casing injection molded with a second size stator assembly;

FIG. 6 is an enlarged partial view of FIG. 5 at B;

FIG. 7 is a schematic cross-sectional view of a motor casing for an oil-sealed motor according to an embodiment;

FIG. 8 is a schematic cross-sectional view of a motor casing according to one embodiment for use with a motor without an oil seal;

fig. 9 is a schematic partial cross-sectional view of another embodiment of a motor casing for an oil-sealed motor.

10. A motor housing; 11. a front end cover; 111. a bearing chamber; 112. a shaft hole; 113. an installation part; 1131. mounting holes; 1132. a first seal groove; 114. a fixing hole; 115. an annular flange; 1151. a second seal groove; 116. a positioning recess; 117. processing the dough; 12. a housing body; 121. positioning the boss; 122. threading holes; 123. an assembly hole; 124. an axial positioning step; 20. a rear end cap; 30. a stator assembly; 40. a rotor assembly; 50. a rotating shaft; 60. a bearing; 70. a junction box; 80. a cable; 90. a wave washer; 100. a fastener; 200. an oil seal plate; 210. oil sealing; 300. a first seal member; 400. injecting a plastic material; 500. injection molding of a core rod; 600. a second seal.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "first" and "second" used herein do not denote any particular order or quantity, but rather are used to distinguish one element from another.

Referring to fig. 1 and 2, in an embodiment of the present application, a motor casing 10 includes a front end cover 11 and a casing body 12, the casing body 12 extends from an outer periphery of the front end cover 11 toward one side, the front end cover 11 is provided with a bearing chamber 111 and a shaft hole 112 communicating with the bearing chamber 111, an outer end surface of the front end cover 11 is provided with a mounting portion 113, the mounting portion 113 is provided with a mounting hole 1131, and as shown in fig. 3, the mounting hole 1131 is used for cooperating with a fastener 100 to detachably mount an oil seal plate 200 on the mounting portion 113.

Specifically, referring to fig. 7 and 8, the motor includes a motor housing 10, a rear end cover 20, a stator assembly 30, a rotor assembly 40, a rotating shaft 50, a bearing 60, a junction box 70, a cable 80, and the like. The front end cover 11 and the shell body 12 of the motor casing 10 enclose to form an accommodating cavity, when the motor is assembled, the bearing 60 is installed in the bearing chamber 111, the wave washer 90 is arranged between the bearing 60 and the motor casing 10, the stator assembly 30 and the rotor assembly 40 are installed in the accommodating cavity, the output end of the rotating shaft 50 penetrates out through the shaft hole 112 in the front end cover 11, and the rear end cover 20 covers one end of the shell body 12 far away from the front end cover 11. In order to facilitate the assembly of the rear end cap 20 and the motor casing 10, optionally, as shown in fig. 2, an inner circumferential surface of one end of the casing body 12 away from the front end cap 11 is provided with a positioning boss 121 which is matched with an end portion of the rear end cap 20. In addition, as shown in fig. 1, the case body 12 is further provided with a threading hole 122 for the cable 80 to pass through, and a fitting hole 123 for installing the junction box 70. The front end cover 11 is provided with a fixing hole 114 for fixing the entire motor to an external device. The mounting portion 113 of the front cover 11 may be selectively mounted with an oil seal plate 200 according to the type of motor used, wherein the oil seal plate 200 is provided with an oil seal 210. As shown in fig. 7, when the oil seal plate 200 is mounted on the mounting portion 113, the motor with the oil seal is obtained; as shown in fig. 8, when the oil seal plate 200 is not mounted on the mounting portion 113, the motor is not oil sealed. Thus, the motor casing 10 can be applied to both the motor with the oil seal and the motor without the oil seal. Alternatively, when the motor casing 10 is used for an oil-sealed-free motor, the outer edge portion of the front cover 11 may be cut back as appropriate to form a motor mounting flange, the machined surface 117 of which is shown in fig. 8.

In addition, in order to ensure the mounting reliability of the oil seal plate 200, at least two mounting holes 1131 may be optionally provided in the mounting portion 113. For example, as shown in fig. 1, two mounting holes 1131 are provided, and the two mounting holes 1131 are symmetrically provided at two opposite sides of the periphery of the shaft hole 112. The mounting holes 1131 may be threaded holes, and correspondingly, the fasteners 100 may be screws. Of course, in other embodiments, the mounting holes 1131 and the fasteners 100 may be fixed by interference fit. Additionally, in other embodiments, as shown in fig. 9, the oil seal plate 200 may also be used to compress the wave washer 90 and the bearing 60.

The mounting portion 113 is arranged on the front end cover 11 of the motor case 10, when the motor case is used for a motor with an oil seal, the oil seal plate 200 is attached to the mounting portion 113, and then the fastener 100 penetrates through the oil seal plate 200 to be matched with the mounting hole 1131, so that the oil seal plate 200 is locked and fixed to the mounting portion 113, and thus, the mounting and fixing of the oil seal plate 200 can be realized; when being used for not taking the oil blanket motor, pull down oil seal board 200 from installation department 113, do not install oil seal board 200 can, because do not take the oil blanket motor not install oil seal board 200 for do not take the effective shortening of oil blanket motor length in the axial, power density improves.

Further, referring to fig. 1 and 7, the mounting portion 113 is further provided with a first seal groove 1132 for mounting the first seal 300, and the first seal 300 is used for sealing and connecting the oil seal plate 200 and the front end cover 11. Specifically, the first sealing groove 1132 is annular and is arranged around the periphery of the shaft hole 112, and when the motor is used for driving an oil seal, the first sealing element 300 is installed in the first sealing groove 1132, and after the oil seal plate 200 is fixed to the installation portion 113, the oil seal plate 200 presses the first sealing element 300, so that a reliable sealing connection can be formed between the oil seal plate 200 and the front end cover 11, and a good sealing effect can be achieved. The first sealing member 300 includes, but is not limited to, a sealing ring, a sealant, etc. The number of the first sealing grooves 1132 may be set to one, two or more according to actual requirements.

Further, the mounting portion 113 is recessed inward with respect to the outer end surface of the front end cover 11 to form a positioning groove having a groove depth smaller than the thickness of the oil seal plate 200. Can play the quick positioning action to the installation of oil seal board 200 through the constant head tank, can realize the rapid Assembly of oil seal board 200.

In addition, the front end housing and the shell body of the traditional motor are of a split structure generally, and when the motor is assembled, the front end housing and the shell body need to be assembled through screws, so that the assembly process is complex, and the manufacturing cost of the motor is increased. In an embodiment of the present invention, the front cover 11 is integrally formed at an end of the housing body 12. The front end cover 11 and the shell body 12 are integrally designed, one-time mold opening production is carried out, the assembly process can be effectively simplified, the manufacturing cost of the motor is reduced, and meanwhile, the structural strength of the motor shell 10 can be guaranteed.

Referring to fig. 2 and 7, in one embodiment, an axial positioning step 124 is disposed on an inner peripheral wall of the casing body 12, and the axial positioning step 124 is used for limiting and abutting against an end surface of the stator assembly 30. So, when hot jacket stator module 30, axial positioning step 124 through motor casing 10 self alright realize the location to stator module 30, need not to adjust the axial position of stator module 30 in motor casing 10 with the help of the frock, can effectively reduce the assembly degree of difficulty, reduces motor manufacturing cost. There are various specific structures of the axial positioning step 124, for example, the axial positioning step 124 may be an arc-shaped structure continuously extending along the inner circumferential surface of the housing body 12. Alternatively, the axial positioning step 124 may be composed of a plurality of bosses provided at intervals in the circumferential direction along the inner circumferential surface of the housing body 12.

Further, as shown in fig. 2, an inner end surface of the front end cover 11 is provided with an annular flange 115 at a periphery of the bearing chamber 111, and an injection molding cavity is defined between the annular flange 115 and the housing body 12. As shown in fig. 3 and 5, after the stator assembly 30 is assembled into the housing body 12, the injection molding material 400 is injected into the injection molding cavity to perform injection molding on the stator assembly 30, so that the stator assembly 30 can be well insulated and waterproof.

When the stator injection molding process is performed, the injection core rod 500 needs to be inserted into the inner cavity of the stator assembly 30, and after the injection core rod 500 is matched with the annular flange 115, injection molding is performed, and since a certain gap may exist between the injection core rod 500 and the annular flange 115, the injection molding material 400 leaks into the bearing chamber 111 from the injection cavity, so that the subsequent installation of the bearing 60 is affected. In order to solve the above problem, a second sealing groove 1151 for installing a second sealing member 600 is further provided on the annular flange 115, and the second sealing member 600 is used for cooperating with the injection core rod 500 during injection molding so as to block the injection cavity from the bearing chamber 111. Specifically, the second sealing groove 1151 is annularly disposed, and the second sealing element 600 is a sealing ring or a sealant. When injection molding is performed, the injection molding core rod 500 extrudes the second sealing element 600 to separate a leakage path of the injection molding material 400, so that leakage of the injection molding material 400 is avoided, and injection molding efficiency and reliability are improved. The number and the position of the second sealing grooves 1151 may be set according to actual conditions.

In one embodiment, the annular flange 115 is provided with a second seal groove 1151 on both the end face and the circumferential face. Therefore, when the motor shell 10 is applied to injection molding of stator assemblies 30 of different sizes, leakage of injection molding material 400 can be effectively avoided. For example, as shown in fig. 3, when the inner diameter D1 of the stator assembly 30 is larger than the inner diameter D2 of the bearing chamber 111, the end surface of the injection mandrel 500 abuts against the end surface of the annular flange 115, the leakage path of the injection molding compound 400 is shown by the arrow in fig. 4, and the injection mandrel 500 presses the second seal 600 to form a reliable seal by disposing the second seal 600 in the second seal groove 1151 of the end surface of the annular flange 115, thereby preventing the injection molding compound 400 from leaking along the leakage path shown in fig. 4. As shown in fig. 5, when the inner diameter D1 of the stator assembly 30 is smaller than the inner diameter D2 of the bearing housing 111, the outer circumferential surface of the end of the injection mandrel 500 is engaged with the inner circumferential surface of the annular flange 115, the leakage path of the injection molding compound 400 is shown by the arrow in fig. 6, and the injection mandrel 500 presses the second seal 600 to form a reliable seal by disposing the second seal 600 in the second seal groove 1151 of the inner circumferential surface of the annular flange 115, thereby preventing the injection molding compound 400 from leaking along the leakage path shown in fig. 6. In addition, in other embodiments, a second sealing groove 1151 may also be provided on a side of the annular flange 115 close to the injection molding cavity, and the number of the second sealing grooves 1151 may be one, two or more as required, as long as leakage of the injection molding material 400 can be effectively prevented.

Further, referring to fig. 2 and 3, the inner end surface of the front end cover 11 is further provided with a positioning concave portion 116 communicating with the injection molding cavity. During injection molding, the injection molding material 400 can flow into the positioning concave portion 116, and after the injection molding material 400 is solidified, a reliable positioning connection can be formed, so that the stator assembly 30 can be radially positioned. Optionally, two or more positioning recesses 116 are provided for better radial positioning. For example, as shown in fig. 2, the positioning recess 116 is provided in two, distributed on opposite sides of the periphery of the annular flange 115.

The invention also proposes an electric machine comprising a motor casing 10 as defined in any one of the above. The specific structure of the motor casing 10 can refer to the above embodiments, and since the motor adopts all technical solutions of the above embodiments, the motor at least has all beneficial effects brought by the above technical solutions, and is not described herein again. It should be noted that the motor herein includes two types of motors with and without oil seal, and when in use, only the oil seal plate 200 needs to be installed or not installed according to actual situations.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A motor casing is characterized by comprising a front end cover and a casing body, wherein the casing body extends from the outer periphery of the front end cover to one side, the front end cover is provided with a bearing chamber and a shaft hole communicated with the bearing chamber, the outer end face of the front end cover is provided with an installation part, the installation part is provided with an installation hole, and the installation hole is used for being matched with a fastener so as to detachably install an oil seal plate on the installation part; the inner end face of the front end cover is provided with an annular flange at the periphery of the bearing chamber, an injection molding cavity is formed by the annular flange and the shell body in a surrounding mode, a second sealing groove used for installing a second sealing element is formed in the annular flange, and the second sealing element is used for being matched with an injection molding core rod when injection molding is conducted, so that the injection molding cavity is separated from the bearing chamber.

2. The motor casing of claim 1, wherein the mounting portion further comprises a first sealing groove for mounting a first sealing element, and the first sealing element is used for sealing and connecting the oil sealing plate and the front end cover.

3. The motor casing according to claim 2, wherein the mounting portion is recessed inward with respect to an outer end surface of the front end cover to form a positioning groove having a groove depth smaller than a thickness of the oil seal plate.

4. The motor casing of claim 1, wherein the front end cap is integrally formed at an end of the casing body.

5. The motor casing of claim 1, wherein the inner peripheral wall of the casing body is provided with an axial positioning step for limiting and abutting against the end face of the stator assembly.

6. The motor casing according to any one of claims 1 to 5, wherein the second seal groove is provided on both an end surface and a peripheral surface of the annular flange.

7. The motor casing of claim 6, wherein the inner end face of the front end cover is further provided with a positioning concave part communicated with the injection molding cavity.

8. The motor casing of claim 7, wherein the positioning recess is provided with two or more.

9. The motor casing of claim 8, wherein the positioning recesses are provided in two, distributed on opposite sides of the periphery of the annular flange.

10. An electric machine comprising a machine housing according to any one of claims 1 to 9.